How to Choose Best Water Tankless Heater (2018) - Buyer's Guide

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Best Water Tankless Heater
We have been working for many hours to make this buying guide. Our team thoroughly compared many water tankless heater from the marketplace to find the best products. Review score, material, brand, weight, and many other specifications were taken into consideration. However, if you still think that there is a way to make our guide better — contact us and share your ideas.

We are here to help you choose the right water tankless heater. Thanks to our water tankless heater buying guide, you will be able to pick the best model on the market.

These Are The 8 Best Water Tankless Heater of 2018

Name and Features Image Rating Details
1. Bosch Tronic 3000 T 4-gallon Electric Mini-tank Water Heater
Electric water heater is easy to maintain and has glass-lined tank for long service life.
Bosch Tronic 3000 T 4-gallon Electric Mini-tank Water Heater
4.8
Read reviews
2. Camplux 5l 1.32 Gpm Outdoor Portable Propane Tankless Water Heater (Most Unique Design)
The maximum temperature raise is 114.8.
Camplux 5l 1.32 Gpm Outdoor Portable Propane Tankless Water Heater
4.5
Read reviews
3. Bosch Electric Tankless Water Heater (Best Classic Design)
Easy installation under bathroom or kitchen sink.
Bosch Electric Tankless Water Heater
4.3
Read reviews
4. Rheem Rtex-13 240v Heating Chamber Residential Tankless Water Heater
Durable copper immersion two heating elements, field serviceable.
Rheem Rtex-13 240v Heating Chamber Residential Tankless Water Heater
4.3
Read reviews
5. Camplux 10l Outdoor 2.64gpm Digital Display Portable Propane Gas Tankless Water Heater
20 mins automatic safety device, flame failure device, anti-freezing protection.
Camplux 10l Outdoor 2.64gpm Digital Display Portable Propane Gas Tankless Water Heater
3.8
Read reviews
6. Thermoflow Elex 5.5 Tankless Water Heater (Budget Pick)
No need to preheat before using.
Thermoflow Elex 5.5 Tankless Water Heater
3.5
Read reviews
7. Bosch Tronic 3000 T 7-gallon Electric Mini-tank Water Heater
This larger model can be mounted vertically (7 gal.
Bosch Tronic 3000 T 7-gallon Electric Mini-tank Water Heater
3.3
Read reviews
8. Marey ECO110 220V Self-Modulating 11 kW
German-designed with high quality stainless steel water channel and heating chamber.
Marey ECO110 220V Self-Modulating 11 kW
3.0
Read reviews

 

 
 

Design
5/5
 

Materials
4/5
 

Construction
5/5
 

Quality
5/5
 
Overall Brand Model Dimensions Weight Details
4.8
Bosch Thermotechnology ES4 Tronic 3000 T 13.8 x 13.5 x 13.8 inches 23.1 pounds
Check Price

Electric water heater is easy to maintain and has glass-lined tank for long service life. Fast recovery rate eliminates long waits for hot water at your sink. 36-37″ cord plugs into a 120 volt outlet for independent installation or in-line with a large hot water source. 4 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Can be shelf, wall or floor mounted (bracket included); simply tap into the cold water line and install the water heater directly at the sink to provide hot water.

 

 
The good
36-37″ cord plugs in
Electric water heater is easy
Can be shelf
Fast recovery rate eliminates long waits
4 gallon point-of-use mini-tank fits under your sink
The bad
This product does not have a single defect.
 

How to find out whether is water tankless heater that I am buying is good?

You can find out everything you need to know about any specific water tankless heater at our site before buying it. That is why we like this marketplace so much: it offers a very convenient website with “Compare” feature, as well as hundreds of user reviews. Read them to understand whether a water tankless heater is suitable for you.

 

 
 

Design
4/5
 

Materials
4/5
 

Construction
5/5
 

Quality
5/5
 
Overall Brand Model Dimensions Weight Details
4.5
CAMPLUX ENJOY OUTDOOR LIFE AY132 11.4 x 5.5 x 14.6 inches 14.35 pounds
Check Price

The maximum temperature raise is 114.8, (46, ) and the minimum temperature raise is 46.4,, 8,, for 1.32gpm. Lowest water pressure startup on the market. Just need 2.5 psi of water pressure. Also works great with camplux 12v 1.2gpm water pump. 20 mins automatic safety device, flame failure device, anti-freezing protection and oxygen depletion safety shutoff protection. Its compact size with folding handle keeps it out of the way, allowing for a convenient set-up outdoors. 1.32 gallons per minute of hot water output, energy saving technology. You can get instant endless hot water easily wherever you are.

 

 
The good
1.32 gallons per minute
Lowest water pressure startup on
The maximum temperature raise is 114.8
20 mins automatic safety device
Its compact size
The bad
Requires delicate care.
 

What is the average cost for a good water tankless heater?

Price is a very important factor of any water tankless heater. Usually, the higher it costs the better its quality. However, we recommend you to consider all characteristics of a water tankless heater. There are many models with an average price tag that can compete with the most expensive options.

 

 
 

Design
3/5
 

Materials
5/5
 

Construction
4/5
 

Quality
5/5
 
Overall Brand Model Dimensions Weight Details
4.3
Bosch Thermotechnology US9 12.2 x 3 x 6.5 inches 5 pounds
Check Price

Easy installation under bathroom or kitchen sink. 9.5 kw output tankless electric water heater provides eliminates long waits, as it provides on-demand hot water supply. Water pressure range: 10 – 150 psi. Mounts on wall in any direction and is space saving, ultra-compact, and lightweight. 98% efficient with minimal stand-by loss. Unit operates on 220-volt at 84-percent of capacity and on 208-volt at 75-percent of capacity.

 

 
The good
Mounts on wall in any direction
Easy installation under bathroom or kitchen sink
98% efficient
Water pressure range
The bad
The instruction manual is completely useless.
 

 

 
 

Design
5/5
 

Materials
5/5
 

Construction
5/5
 

Quality
2/5
 
Overall Brand Model Dimensions Weight Details
4.3
Rheem RTEX-13 4 x 9 x 13 inches 4 pounds
Check Price

External adjustable digital thermostatic control with led display (+/1 degree accuracy. Durable copper immersion two heating elements, field serviceable. External controls to adjust temperature in increments of 1 f. Water-saver shower head 1.5 gpm. Simple installation 3 foot electric cable and 1/2 npt adapters included; side 1/2 inch compression water connections. Threaded for easy replacement, simple installation, digital temperature display.

 

 
The good
99.8% energy efficient
Durable copper immersion two heating elements
Simple installation 3 foot electric cable
External adjustable digital thermostatic control
The bad
Does not offer enough features for such a high price.
There are many better options on the market.
 

Do I need to worry when buying a water tankless heater online?

Why would be buying a water tankless heater online dangerous? Marketplace is nearly always on the buyer’s side during the conflicts resolution. Getting a refund is very easy and only takes a couple of hours. You and your money are completely safe — there is no need to worry. Try to order a water tankless heater from our rating list yourself — this website is very convenient thanks to myriads of user reviews, so you will definitely like it.

 

 
 

Design
2/5
 

Materials
4/5
 

Construction
5/5
 

Quality
4/5
 
Overall Brand Model Dimensions Weight Details
3.8
CAMPLUX ENJOY OUTDOOR LIFE BW264 12.9 x 8.3 x 21.6 inches 23.1 pounds
Check Price

Compact and lightweight structure with 11.5% energy saving techonology. You can get instant endless hot water easily wherever you are. Multi-functional shower head, change the setting to change how you enjoy your hot water. Camplux water heater comes with everything you need, including csa approved gas regulator and required adapters. 20 mins automatic safety device, flame failure device, anti-freezing protection. Summer/winter type convertion function, save more gas in summer time. Also works great with camplux 12v 1.6gpm water pump.

 

 
The good
Multi-functional shower head
Camplux water heater comes
Summer/winter type convertion function
20 mins automatic safety device
The bad
Looks awful.
 

 

 
№ 6. Thermoflow Elex 5.5 Tankless Water Heater Electric for Wash Basins and Utility Sinks, 5.5kw At 240 Volts
 

Design
3/5
 

Materials
5/5
 

Construction
4/5
 

Quality
2/5
 
Overall Brand Model Dimensions Weight Details
3.5
Thermoflow Elex 5.5 9 x 5 x 3 inches 2.18 pounds
Check Price

Compact design – super compact designed, even smaller than a shoe box. Wall-mounted design frees up floor space for more storage, easy to install into washbasin and other tight spaces. Exceptionality durable – instant hot water thanks to rapid and maintenance-free bare wire heating systems. High quality alloy bare heating element has good corrode resistance and acid-resisting, with longer lifespan, instantaneous heating efficiency up to 99%. Endless hot water – no need to preheat before using. As soon as you open the tap, the water, ows with your desired temperature. Notice – please verify that this model is the right size for your hot water needs and electrical requirements before purchase & installation. Dimensions: 9.5 h x 5.7 w x 3.4 d ; weight: 2.3lb; pipes fittings: 1/2 npt, electrical requirements: 5.5 kw.240 volts, nominal pressure: 90psi. Required breakers: 32 amp double pole. ( breakers and wire are not included ).

Tankless – save up to 60% on your water heating cost with an thermoflow electric tankless water heater. Distribution, start-up and technical systems losses as well as circulation and storage losses are eliminated.

 

 
The good
Endless hot water
Compact design
Exceptionality durable
The bad
It is too expensive.
 

 

 
 

Design
3/5
 

Materials
5/5
 

Construction
2/5
 

Quality
3/5
 
Overall Brand Model Dimensions Weight Details
3.3
Bosch Thermotechnology ES8 Tronic 3000 T 17.5 x 14.5 x 17.5 inches 35 pounds
Check Price

Heating capacity of 1440 watts and a temperature range of 65-145 f. This larger model can be mounted vertically (7 gal. Of water supply) or horizontally (5.1 gal. Of water supply)- vertical orientation is installed with the cold and hot lines on top of the unit. Hard-wire the 7-gallon model to provide the on-demand reliable water source your home needs. 7-gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Can be shelf, wall or floor mounted (bracket included for vertical orientation only); simply tap into the cold water line and install the water heater directly at the sink to provide hot water.

 

 
The good
Can be shelf
Heating capacity
7-gallon point-of-use mini-tank fits under your sink
This larger model can be mounted vertically
The bad
It cannot be disassembled.
 

 

 
№ 8. Marey ECO110 220V Self-Modulating 11 kW, 3.0 Gpm Multiple Points of Use Tankless Electric Water Heater for Us Southern Regions, Small, White
 

Design
2/5
 

Materials
5/5
 

Construction
2/5
 

Quality
3/5
 
Overall Brand Model Dimensions Weight Details
3.0
MAREY ECO110 3 x 8.6 x 14.8 inches 9.7 pounds
Check Price

Marey s eco line can maintain 98% efficiency level throughout their lifetime. German-designed with high quality stainless steel water channel and heating chamber. Smart technology: easy management and simple adjustments on a lcd panel allows you to program the exact desired water temperature thereby optimizing electricity consumption. Requires 60 amp breaker and must be installed by a professional plumber or electrician to ensure safety and quality. The 220v eco 11kw unit is ideal for 2 simultaneous points of use in USA southern regions where the incoming water temperature is above 70 f. In colder regions, it is suitable for a sink at 1.3 gpm.

 

 
The good
Smart technology
The 220v eco 11kw unit is ideal
Requires 60 amp breaker
The bad
Special equipment is required in order to use it.
 

What should be the warranty period for a good water tankless heater?

We highly recommend you to buy water tankless heaterfrom brands that offer prolonged warranty. If something goes wrong and your water tankless heater breaks down, you will be able to repair it without spending a single penny. Most companies offer a two-year warranty for their products.

Should I get a water tankless heater with a lifetime warranty?

Every manufacturer offer various warranty terms. Some companies sell water tankless heaterwith a lifetime warranty, while the others only offer one-year or two-year protection. The cheapest models usually do not have any warranties at all. We think that five-year warranty is more than enough for the most water tankless heater.

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My name is Erik Neal and I am a House Cleaner. I graduated from University of North Dakota - Grand Forks, North Dakota

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